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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if (TUSB_OPT_HOST_ENABLED && CFG_TUH_CDC)
#include "host/usbh.h"
#include "host/usbh_classdriver.h"
#include "cdc_host.h"
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
typedef struct {
uint8_t itf_num;
uint8_t itf_protocol;
uint8_t ep_notif;
uint8_t ep_in;
uint8_t ep_out;
cdc_acm_capability_t acm_capability;
} cdch_data_t;
//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
static cdch_data_t cdch_data[CFG_TUH_DEVICE_MAX];
static inline cdch_data_t* get_itf(uint8_t dev_addr)
{
return &cdch_data[dev_addr-1];
}
bool tuh_cdc_mounted(uint8_t dev_addr)
{
cdch_data_t* cdc = get_itf(dev_addr);
return cdc->ep_in && cdc->ep_out;
}
bool tuh_cdc_is_busy(uint8_t dev_addr, cdc_pipeid_t pipeid)
{
if ( !tuh_cdc_mounted(dev_addr) ) return false;
cdch_data_t const * p_cdc = get_itf(dev_addr);
switch (pipeid)
{
case CDC_PIPE_NOTIFICATION:
return usbh_edpt_busy(dev_addr, p_cdc->ep_notif );
case CDC_PIPE_DATA_IN:
return usbh_edpt_busy(dev_addr, p_cdc->ep_in );
case CDC_PIPE_DATA_OUT:
return usbh_edpt_busy(dev_addr, p_cdc->ep_out );
default:
return false;
}
}
//--------------------------------------------------------------------+
// APPLICATION API (parameter validation needed)
//--------------------------------------------------------------------+
bool tuh_cdc_serial_is_mounted(uint8_t dev_addr)
{
// TODO consider all AT Command as serial candidate
return tuh_cdc_mounted(dev_addr) &&
(cdch_data[dev_addr-1].itf_protocol <= CDC_COMM_PROTOCOL_ATCOMMAND_CDMA);
}
bool tuh_cdc_send(uint8_t dev_addr, void const * p_data, uint32_t length, bool is_notify)
{
(void) is_notify;
TU_VERIFY( tuh_cdc_mounted(dev_addr) );
TU_VERIFY( p_data != NULL && length, TUSB_ERROR_INVALID_PARA);
uint8_t const ep_out = cdch_data[dev_addr-1].ep_out;
if ( usbh_edpt_busy(dev_addr, ep_out) ) return false;
return usbh_edpt_xfer(dev_addr, ep_out, (void *) p_data, length);
}
bool tuh_cdc_receive(uint8_t dev_addr, void * p_buffer, uint32_t length, bool is_notify)
{
(void) is_notify;
TU_VERIFY( tuh_cdc_mounted(dev_addr) );
TU_VERIFY( p_buffer != NULL && length, TUSB_ERROR_INVALID_PARA);
uint8_t const ep_in = cdch_data[dev_addr-1].ep_in;
if ( usbh_edpt_busy(dev_addr, ep_in) ) return false;
return usbh_edpt_xfer(dev_addr, ep_in, p_buffer, length);
}
bool tuh_cdc_set_control_line_state(uint8_t dev_addr, bool dtr, bool rts, tuh_control_complete_cb_t complete_cb)
{
cdch_data_t const * p_cdc = get_itf(dev_addr);
tusb_control_request_t const request =
{
.bmRequestType_bit =
{
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_CLASS,
.direction = TUSB_DIR_OUT
},
.bRequest = CDC_REQUEST_SET_CONTROL_LINE_STATE,
.wValue = (rts ? 2 : 0) | (dtr ? 1 : 0),
.wIndex = p_cdc->itf_num,
.wLength = 0
};
TU_ASSERT( tuh_control_xfer(dev_addr, &request, NULL, complete_cb) );
return true;
}
//--------------------------------------------------------------------+
// USBH-CLASS DRIVER API
//--------------------------------------------------------------------+
void cdch_init(void)
{
tu_memclr(cdch_data, sizeof(cdch_data));
}
bool cdch_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *itf_desc, uint16_t max_len)
{
(void) max_len;
// Only support ACM subclass
// Protocol 0xFF can be RNDIS device for windows XP
TU_VERIFY( TUSB_CLASS_CDC == itf_desc->bInterfaceClass &&
CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL == itf_desc->bInterfaceSubClass &&
0xFF != itf_desc->bInterfaceProtocol);
cdch_data_t * p_cdc = get_itf(dev_addr);
p_cdc->itf_num = itf_desc->bInterfaceNumber;
p_cdc->itf_protocol = itf_desc->bInterfaceProtocol;
//------------- Communication Interface -------------//
uint16_t drv_len = tu_desc_len(itf_desc);
uint8_t const * p_desc = tu_desc_next(itf_desc);
// Communication Functional Descriptors
while( TUSB_DESC_CS_INTERFACE == tu_desc_type(p_desc) && drv_len <= max_len )
{
if ( CDC_FUNC_DESC_ABSTRACT_CONTROL_MANAGEMENT == cdc_functional_desc_typeof(p_desc) )
{
// save ACM bmCapabilities
p_cdc->acm_capability = ((cdc_desc_func_acm_t const *) p_desc)->bmCapabilities;
}
drv_len += tu_desc_len(p_desc);
p_desc = tu_desc_next(p_desc);
}
if ( TUSB_DESC_ENDPOINT == tu_desc_type(p_desc) )
{
// notification endpoint
tusb_desc_endpoint_t const * desc_ep = (tusb_desc_endpoint_t const *) p_desc;
TU_ASSERT( usbh_edpt_open(rhport, dev_addr, desc_ep) );
p_cdc->ep_notif = desc_ep->bEndpointAddress;
drv_len += tu_desc_len(p_desc);
p_desc = tu_desc_next(p_desc);
}
//------------- Data Interface (if any) -------------//
if ( (TUSB_DESC_INTERFACE == tu_desc_type(p_desc)) &&
(TUSB_CLASS_CDC_DATA == ((tusb_desc_interface_t const *) p_desc)->bInterfaceClass) )
{
// next to endpoint descriptor
drv_len += tu_desc_len(p_desc);
p_desc = tu_desc_next(p_desc);
// data endpoints expected to be in pairs
for(uint32_t i=0; i<2; i++)
{
tusb_desc_endpoint_t const *desc_ep = (tusb_desc_endpoint_t const *) p_desc;
TU_ASSERT(TUSB_DESC_ENDPOINT == desc_ep->bDescriptorType && TUSB_XFER_BULK == desc_ep->bmAttributes.xfer);
TU_ASSERT(usbh_edpt_open(rhport, dev_addr, desc_ep));
if ( tu_edpt_dir(desc_ep->bEndpointAddress) == TUSB_DIR_IN )
{
p_cdc->ep_in = desc_ep->bEndpointAddress;
}else
{
p_cdc->ep_out = desc_ep->bEndpointAddress;
}
drv_len += tu_desc_len(p_desc);
p_desc = tu_desc_next( p_desc );
}
}
return true;
}
bool cdch_set_config(uint8_t dev_addr, uint8_t itf_num)
{
(void) dev_addr; (void) itf_num;
return true;
}
bool cdch_xfer_cb(uint8_t dev_addr, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes)
{
(void) ep_addr;
tuh_cdc_xfer_isr( dev_addr, event, 0, xferred_bytes );
return true;
}
void cdch_close(uint8_t dev_addr)
{
TU_VERIFY(dev_addr <= CFG_TUH_DEVICE_MAX, );
cdch_data_t * p_cdc = get_itf(dev_addr);
tu_memclr(p_cdc, sizeof(cdch_data_t));
}
#endif
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